"In 1938, he invited the first failure by hiring Coleman R. Griffith, a groundbreaking researcher in the fledgling field of sports psychology, to consult for the Cubs on implementing a rigorous training program. As Professor Richard J. Puerzer recounted in a 2006 essay for the Society for American Baseball Research (SABR), Griffith’s work included “filming players, recommending improved training regimes, the documentation of player progress through charts and diagrams, and changes in batting and pitching practice in order to make the practice sessions more closely resemble game conditions.”10 The psychologist was speaking the language of advanced player development about eight decades ahead of his time." - Ben Lindbergh